Here are widely available dry‑food brands (and typical product lines) that offer recipes formulated without corn or soy. Note: many brands have multiple lines—always check the ingredient list for the specific recipe you’re buying because formulations vary by formula and can change over time.

• ORIJEN (Original / Fit & Trim — grain‑free, no corn or soy). (peekapaw.com.au)
• ACANA (Meadowlands / Grasslands — grain‑free recipes that state “no added soy, corn…”). (nurturepet.com)
• Wellness CORE (Core Grain‑Free dry cat formulas — marketed “no grains, wheat, corn, soy”). (petso.com.au)
• Instinct (Original / Limited Ingredient grain‑free lines — many recipes list “no grain, potato, corn, wheat, soy”). (instinctpetfood.com)
• Merrick (Limited‑Ingredient & many Grain‑Free dry recipes — L.I.D. lines state “no grain, corn, wheat, or soy”). (merrickpetcare.com)
• Taste of the Wild (PREY / grain‑free limited‑ingredient formulas — many labeled free of corn and soy). (myrainbowpets.com.au)
• Farmina N&D (N&D / N&D Prime grain‑free cat formulas — marketed grain/corn free). (farmina.com)
• ZiwiPeak (air‑dried / pâté lines — limited ingredients, no grains/corn/soy or fillers). (petology.com.au)
• Fromm (Four‑Star and some Gold recipes — grain‑free options that state “no corn, wheat or soy”). (petonly.ca)
• Natural Balance L.I.D. (Limited Ingredient Diet dry recipes — explicitly formulated without corn, wheat or soy). (naturalbalanceinc.com)

Quick buying tips

• Look at the ingredient panel for the specific recipe: avoid labels listing “corn,” “corn gluten meal,” “soy,” “soybean meal,” etc. (brands may have both grain‑free and grain‑inclusive lines). (frommfamily.com)
• Grain‑free formulas often replace corn/soy with peas, lentils or potatoes — those are common fillers/substitutes and can still be problematic for some cats with sensitivities. (peekapaw.com.au)
• If your cat has true food allergies, work with your veterinarian — they can recommend an elimination diet or a veterinary hypoallergenic formula. (thesprucepets.com)

If you’d like, I can:

• Check availability/prices for any of these brands in Australia (I can look up local stockists), or
• Compare 3–4 specific recipes (ingredient lists) to confirm they contain no corn/soy.